Two waves of same frequency $n$ are approaching each other with same velocity, $v=20 \mathrm{~m} /…
Two waves of same frequency $n$ are approaching each other with same velocity, $v=20 \mathrm{~m} / \mathrm{s}$ and interfere. The distance between two consecutive nodes is
$\frac{20}{n}$
$\frac{10}{n}$
$\frac{5}{n}$
$\frac{n}{10}$
Solution
Distance between two consecutive nodes is given by, $x=\frac{\lambda}{2}$.
$x=\frac{\lambda}{2}=\frac{1}{2}\left(\frac{v}{n}\right)=\frac{20 \mathrm{~ms}^{-1}}{2 n \mathrm{~s}^{-1}}=\frac{10}{n}$